Revert "LongPluginOutput: Fix missing support of multi line in html"

This reverts commit 14fdf6323dde83ba51d61d29f7ff3ee4b23614f4.

The fix actually fixes nothing for the following reasons:

1) The "Long plugin output" field of a host's or service's detail window already has `\n' replaced with the HTML break tag.
This is because the information is gathered via Icinga Web's API which calls `Api_Result_OutputRewriteModel::rewritePluginOutput()'
in the controller `ApiSearchAction'.
Note that the carriage return `\r' is not taken into accout, but that's not a problem here.

2) Grids do not benefit from `Api_Result_OutputRewriteModel::rewritePluginOutput()' as its not being called. The `nl2br()' should've
helped here. According to http://www.ietf.org/rfc/rfc4627.txt the JSON representation of strings must escape control characters which includes the line feed `\n'
and the carriage return `\r'. So '\n', '\r' and '\r\n' become '\\n', '\\r' and '\\r\\n' respectively making them a textual representation of the control characters.
The `nl2br()' implementation however only replaces the unescaped line feed and carriage return which does of course replace nothing in the above case.

3) Introducing `String::nl2br()' while ExtJS provides `Ext.util.Format.nl2br()' is superfluous.

refs #2653
Grid/columns: Replace new lines with the HTML break when `multiLine' is enabled

Example config:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<template match-pattern="icinga-(service-template|.+-service-problems)">
    <fields>
        <field name="plugin_long_output">
            <datasource>
                <parameter name="field">SERVICE_LONG_OUTPUT</parameter>
            </datasource>
            <display>
                <parameter name="visible">true</parameter>
                <parameter name="label">Long output</parameter>
                <parameter name="jsFunc">
                    <parameter>
                        <parameter name="namespace">Cronk.grid.ColumnRenderer</parameter>
                        <parameter name="function">customColumnPerfdataSanitized</parameter>
                        <parameter name="arguments">
                            <parameter name="multiLine">1</parameter>
                        </parameter>
                    </parameter>
                </parameter>
            </display>
            <filter>
                <parameter name="enabled">false</parameter>
            </filter>
            <order>
                <parameter name="enabled">false</parameter>
                <parameter name="default">false</parameter>
            </order>
        </field>
    </fields>
</template>

refs #2653
Fix README.{RHEL,SUSE} db setup
Fix build requires for fc20

fixes #6816
Add Apache 2.4 'Require all granted' examples

fixes #6770
Properly fix support for Apache 2.2 and 2.4

refs #6770
Ignore vagrant working dir
Fix inconsistent db schema versions (bump to 1.11.2)

fixes #6899
Fix apache2 restart on rewrite in SUSE rpms

fixes #6663
Update INSTALL and README

refs #6900
Update AUTHORS

refs #6900
Release version 1.11.2

fixes #6900